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Finding the Fourth Proportional to 444.30, 666.45 and 290.40

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Solution

The fourth proportional to 444.30, 666.45 and 290.40 is: 435.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.30 : 666.45 = 290.40 : x
  2. Step 2: Convert to fraction form
    444.30/666.45 = 290.40/x
  3. Step 3: Cross multiply
    444.30x = 666.45 × 290.40
  4. Step 4: Simplify right side
    444.30x = 193,537.08
  5. Step 5: Solve for x
    x = 193,537.08/444.30
  6. Step 6: Final answer
    x = 435.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.